That pretty much tells you everything you really need to know about not-quite-extinct dinosaurs.
Retired Army Colonel Marcia Morgan ran against Ted Davis in 2018 and came within 883 votes of beating Davis. I profiled her on this site in January 2018.
She would seem to be a natural pick to try again (though I confess I haven't met her and don't know what sort of campaign she ran ... but I tend to trust those 2018 numbers, since Ted Davis had not previously had Democratic opposition when he ran for reelection).
Morgan's Twitter account has lain idle since the election last November until a single tweet on August 7:
If she's beginning to bestir herself as a political tweeter, might an election announcement for 2020 be far behind?